I kind of agree, but the ref was watching real closely toward the end of the fight abd there was no cyrtal clear moment to stop it. Being that Angulo had that nasty cut that was caused by a punch, he did kind of have a shot.

The ref could have stopped it, but I can see why he had not quite yet and he did seem to be looking really closely at what was going on so I do not think it would have gone on much longer anyways.